Novel disordering mechanism in ferromagnetic systems with competing interactions

Juan Carlos Andresen, Creighton K. Thomas, Helmut G. Katzgraber, Moshe Schechter

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Ferromagnetic Ising systems with competing interactions are considered in the presence of a random field. We find that in three space dimensions the ferromagnetic phase is disordered by a random field which is considerably smaller than the typical interaction strength between the spins. This is the result of a novel disordering mechanism triggered by an underlying spin-glass phase. Calculations for the specific case of the long-range dipolar LiHo xY1-xF4 compound suggest that the above mechanism is responsible for the peculiar dependence of the critical temperature on the strength of the random field and the broadening of the susceptibility peaks as temperature is decreased, as found in recent experiments by Silevitch et al... Our results thus emphasize the need to go beyond the standard Imry-Ma argument when studying general random-field systems.

Original languageEnglish
Article number177202
JournalPhysical Review Letters
Issue number17
StatePublished - 23 Oct 2013

ASJC Scopus subject areas

  • Physics and Astronomy (all)


Dive into the research topics of 'Novel disordering mechanism in ferromagnetic systems with competing interactions'. Together they form a unique fingerprint.

Cite this